To determine if subgroups of human SCLC tumors could be identified based upon INSM1/YAP1 mRNA expression, we initially examined RNAseq data from Rudin et al [14] and gene array data from George et al [15] and found that both datasets contained tumors with low INSM1/YAP1 mRNA expression ratios (Figure 3A and 3B, respectively), as observed for Group II cell lines (Figure 3C), albeit less frequently. Here, YAP1 is linked to small cell lung carcinoma.